Smallest prime == 1 (mod f(n)), where f(n) = concatenation 1,2,3...,n-1,n,n-1,...,3,2,1.
A109949
Smallest prime == 1 (mod f(n)), where f(n) = concatenation 1,2,3...,n-1,n,n-1,...,3,2,1.
Terms
- a(0) =2a(1) =727a(2) =147853a(3) =7405927a(4) =3456720989a(5) =24691308643
External references
- oeis: A109949